/*
 * Copyright (c) 2001-2008 Caucho Technology, Inc.  All rights reserved.
 *
 * The Apache Software License, Version 1.1
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution, if
 *    any, must include the following acknowlegement:
 *       "This product includes software developed by the
 *        Caucho Technology (http://www.caucho.com/)."
 *    Alternately, this acknowlegement may appear in the software itself,
 *    if and wherever such third-party acknowlegements normally appear.
 *
 * 4. The names "Burlap", "Resin", and "Caucho" must not be used to
 *    endorse or promote products derived from this software without prior
 *    written permission. For written permission, please contact
 *    info@caucho.com.
 *
 * 5. Products derived from this software may not be called "Resin"
 *    nor may "Resin" appear in their names without prior written
 *    permission of Caucho Technology.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED.  IN NO EVENT SHALL CAUCHO TECHNOLOGY OR ITS CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
 * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
 * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * @author Scott Ferguson
 */
package net.hasor.libs.com.caucho.hessian.io;
import java.io.IOException;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
/**
 * Serializing an object for known object types.
 */
@SuppressWarnings({ "unused" })
public class WriteReplaceSerializer extends AbstractSerializer {
    private static Object[] NULL_ARGS = new Object[0];
    private Object          _writeReplaceFactory;
    private Method          _writeReplace;
    private Serializer      _baseSerializer;
    public WriteReplaceSerializer(Class<?> cl, ClassLoader loader, Serializer baseSerializer) {
        introspectWriteReplace(cl, loader);
        _baseSerializer = baseSerializer;
    }
    private void introspectWriteReplace(Class<?> cl, ClassLoader loader) {
        try {
            String className = cl.getName() + "HessianSerializer";
            Class<?> serializerClass = Class.forName(className, false, loader);
            Object serializerObject = serializerClass.newInstance();
            Method writeReplace = getWriteReplace(serializerClass, cl);
            if (writeReplace != null) {
                _writeReplaceFactory = serializerObject;
                _writeReplace = writeReplace;
            }
        } catch (ClassNotFoundException e) {
            //
        } catch (Exception e) {
            log.debug(e.toString(), e);
        }
        _writeReplace = getWriteReplace(cl);
        if (_writeReplace != null)
            _writeReplace.setAccessible(true);
    }
    /**
     * Returns the writeReplace method
     */
    protected static Method getWriteReplace(Class<?> cl, Class<?> param) {
        for (; cl != null; cl = cl.getSuperclass()) {
            for (Method method : cl.getDeclaredMethods()) {
                if (method.getName().equals("writeReplace") && method.getParameterTypes().length == 1 && param.equals(method.getParameterTypes()[0]))
                    return method;
            }
        }
        return null;
    }
    /**
     * Returns the writeReplace method
     */
    protected static Method getWriteReplace(Class<?> cl) {
        for (; cl != null; cl = cl.getSuperclass()) {
            Method[] methods = cl.getDeclaredMethods();
            for (int i = 0; i < methods.length; i++) {
                Method method = methods[i];
                if (method.getName().equals("writeReplace") && method.getParameterTypes().length == 0)
                    return method;
            }
        }
        return null;
    }
    public void writeObject(Object obj, AbstractHessianOutput out) throws IOException {
        int ref = out.getRef(obj);
        if (ref >= 0) {
            out.writeRef(ref);
            return;
        }
        try {
            Object repl;
            repl = writeReplace(obj);
            if (obj == repl) {
                if (log.isDebugEnabled()) {
                    log.debug(this + ": Hessian writeReplace error.  The writeReplace method (" + _writeReplace + ") must not return the same object: " + obj);
                }
                _baseSerializer.writeObject(obj, out);
                return;
            }
            out.writeObject(repl);
            out.replaceRef(repl, obj);
        } catch (RuntimeException e) {
            throw e;
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }
    @Override
    protected Object writeReplace(Object obj) {
        try {
            if (_writeReplaceFactory != null)
                return _writeReplace.invoke(_writeReplaceFactory, obj);
            else
                return _writeReplace.invoke(obj);
        } catch (RuntimeException e) {
            throw e;
        } catch (InvocationTargetException e) {
            throw new RuntimeException(e.getCause());
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }
}
